Roll-polisher.



A. J. MASKREY.

ROLL POLISHER.

APPLICATION FILED JAN-28,1916.

1,219,535. Patented Jan. 16,1917.

, SHEET I.

2 SHEETS- awm/wboz A. J. MASKREY.

ROLL POLISHER.'

APPLlCATlON FILED 1AN.28, 1916.

1 212,535. Pat-allied Jan. 16, 1917.

2 SHEETS-SHEET 2.

ROLL-POLISHER.

Specification of Letters Patent.

Patented Jan. 16, 1917.

' Application filed January 28, 1916. Serial No. 74,768.

To all whom it may concern.-

Be it known that I, ARTHUR J. FIASKREY, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Roll-Polisher, of which the following is a specification.

My invention relates to improvements in roll polishers for polishing the rolls of rolling mills and the like, and has more especial reference to a roll polisher of the character referred to which is adapted to be connected to the mill whereby the rolls at any or all times may be readily and easily trued by grinding away all roughness and unevenness or any foreign matter which frequently collects or adheres to the faces of the rolls and refers more particularly to a device of this character which comprises a plurality of independently movable polishing blocks upon one side of the roll for grinding or truing the roll and a series of finer or smoother polishing blocks upon the other side of the roll for polishing the roll, means being provided for moving said polishing blocks singly or in pairs to bring the same into contact with the face of the roll.

The object of my invention is to provide a device of the character referred to, which can be employed for truing and polishing the rolls without interfering in any manner with the operation of the rolls, whereby, the rolls may be kept in proper condition at all times, the grinding and polishing being effected during the operation of the mill.

A further object of the invention is to provide a device which may remain upon the housing of the mill at all times and which comprises a plurality of independ ently movable grinding blocks and a plurality of independently movable polishing blocks adapted to be held in contact with the rolls.

A further object of the invention is the provision of a device such as above referred to in which any two portions of the roll equi-distant from the center thereof may be independently ground or trued, and in which the center of the roll or any two portions equi-distant from the center may be independently polished or in which all portions of the surface of the roll may be simultaneously polished as desired, corresponding blocks at either side of the center being independently movable toward or away from the center of the roll.

A further object is the provision of a device of this character in which different combinations of grinding or truing blocks and polishing blocks may be held in contact with the surface of the roll as desired.

A still further object is the provision of a device of the above type in which the blocks upon opposite sides of the roll may be located in staggered relation.

A still further object is a device of this character by the use of which the rolls may be left in the mill all the week without the necessity of reducing the sizes of the sheets rolled therein as the blocks adjacent the ends of the rolls may, during most of the time be held in contact with the rolls to prevent the concavity of the rolls increasing by wear, said increase being usually greater in the center of the rolls than at the ex tremities thereof.

With these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the scope of the appended claims, without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings: Figure 1 is a vertical section through a rolling mill, showing my improved polisher applied thereto. Fig. 2 is a section 011 the line 22, Fig/1. Fig. 3 is a front elevation of the grinding blocks and the mechanism for op erating the same. Fig. 4 is a transverse section on the line 47-4, Fig. 3. Fig. 5 is a perspective view of a portion of the cam shaft showing one of the cams thereon. Fig. 6 is a sectional view through one of the cams. Fig. 7 is a detail sectional view showing the hinge connection of one of the levers with 'the plate which supports the polishing blocks.

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawings.

Heretofore in the practical operation of rolling mills, and more especially in the operation of sheet, tin and black-plate mills and used are fundamental facts of commonknowledge to those skilled in the art. The rolls are so made as to produce the proper gage and quality of product when they are in actual, practical operation. lVhen the rolls are cool the product is of inferior grade and uncertain gage and in order to produce rolled metal of uniformly high standard of quality it is desirable that the rolls be operated as continuously as possible so that the temperature thereof may remain substantially uniform. In use the finely polished surfaces of the rolls become scratched, abraded and roughened. The demand of the trade is for a product having a smooth and even surface and in order to maintain the rolls in proper condition to produce such metal frequent polishings have been heretofore necessary. This polishing has commonly been accomplished by manually holding a large polishing block of carborundum or the like against the rolls, or by another device adapted to be permanently attached to the mill, whereby a rotary grinding wheel could be brought into contact with the rolls. With the first of these methods, however, it has been necessary to remove a part of the attachments belonging to the mill in order to make the rolls accessible for the polishing operation and the removal of these attachments, the polishing itself, and the subsequent assembling of the attachments preparatory to rolling requires considerable time. The rolls thus become cool during this operation and the operation necessarily results in a very considerable economic loss for all concerned. Attention should also be called to the fact that the product of mills so ground must necessarily be of unequal quality, for the product of the mill immediately after the polishing, when the surfaces of the rolls are in the best condition, is poor because the rolls are somewhat cooled. By the time the rolls have been heated by further working the surfaces have already become somewhat roughened and uneven and at the time the rolls are in the best condition as to temperature the surfaces of the rolls have already lost their high polish. As the work proceeds the surface of the rolls becomes more and more roughened By my invention-I propose to remedy the above described unsati'sfactoryand' undesirable "condition by providing a polishing device which-is constantly in operation, thus maintaining the surfaces of the rolls in uniformly perfect condition at all times and Referring more especially to the construction illustrated in the accompanying draw ings, the numerals 11 indicate the housings of a rolling mill of the usual construction. The numeral 2 indicates the upper roll and the numeral 3 the lower roll of the mill. All of these parts are of common construction and require no specific description.

Essentially my invention comprises a plurality of grindingor truing blocks located upon one side of each roll, and a plurality of polishing orsmoothing blocks located upon the otherside of each roll, different desired combinations of which may be held in constant frictional contact with the surface of the roll, means being provided for moving said blocks into contact with or away from the roll, it being obvious that each of said blocks or different combinations thereof may be independently operated.

The same mechanism is provided for grinding or polishing the upper and the lower roll and therefore it is thought necessary to describe only one of these mechanisms as they are both constructed and operated in the same manner.

The numerals 4c4, indicate short pins fixedly connected to the housings of the mill and constituting studs upon which the grinding and polishing mechanisms are supported.

A pair of levers 5 are located upon one side of each roll. said levers being provided with notched lugs 6, the notches 7 therein engaging the pins 4, the pins thus forming fulcrums upon which the levers pivot. The lower portion of each lever is preferably bent downwardly at an angle as indicated at 8, and a plate 9 is carried between said lower extremities, said plate being provided at each extremity, upon its lower edge, with a bearing 10 and with a plurality of spacing lugs 11 intermediate the extremities thereof, each of said lugs being provided with a halfround groove adapted to receive the shaft 12, said shaft being journale d in the bearings 10.

The retainers 13 within which the grinding blocks are carried are hingedly mounted upon the shaft 12, each of said retainers being provided with a clove-tailed groove 14 within which is mounted the grinding block 15, preferably dove-tail in form. Each of the retainers within which one of the grinding blocks is carried is of the form best shown in Fig. 3 of the drawings. Each of the retainers is beveled at each extremity for the purpose ofpreventing seams or ridges being formed upon the face of the roll and each retainer is closed at one end by a wall 16 and open at the other end, the two open ends of adjacent retainers being placed together as shown in Fig. By this construction each block is held in position within its retainer it not being necessary to provide any form of fastening means to con nect the block to the retainer, the blocks being merely slipped into the dove-tailed grooves in the retainers and thus held against end movement. A lug 17 provided with a curved face 18 is-provided upon the upper edge of each of the retainers.

A bearing 19 is provided near each extremity of the upper edge of the plate 9 and journaled within said bearings is a cam shaft 20, spaced lugs 21 being provided upon the upper edge of said plate and provided with half round sockets adapted to receive said cam shaft for the purpose of preventing any springing action thereof. A cam L2 is fixedly mounted upon the shaft 20 adjacent each of the lugs 17 and in position to contact with the curved face 18 thereof, said cams being connected to the shaft by means of set screws 23 or other suitable means. Each of the cams is provided with a roller 24:, said roller being preferably provided with a roller hearing as best shown in F 6 for the purpose of allowing the roller 2% to retate with a minimum amount of friction when the cam is brought into contact with the adjacent lug 17.

For the purpose of strengthening each of the plates 9 and preventing any springing of the same. when the grinding blocks are brou ht in contact with the roll longitudinal ribs are provided along the upper and lower edges of the plate and a series of transversely disposed ribs 26 are located at intervals upon the rear face of the plate thus strengthening the plate and preventing any springing or bending of the same when the device is in operation.

A beveled pinion 2'? is provided upon one extremity of the cam shaft 20 and engages a similar pinion 28 which is mounted upon the shaft 29. said shaft being journaled in suitable bearings 30 provided upon one of the. levers A dial 31 is provided at the upper end of the lever upon which said shaft 29 is mounted. said dial being fixedly connected to said lever and the extremity of the shaft 29 passes through said dial and is provided with a hand or pointer 32 adapted to move upon said dial, the extremity of the shaft being provided with a squared portion to which may be applied a wrench 83 or other suitable tool for the purpose of rotat ing the shaft when desired. An oft-set portion 34- is provided at the upper extremity of each of the levers each of said off-set portions being provided with a slot 35 adapted to receive the screw threaded stem 36 to which stem is connected a coil spring 37, the lower extremity of the coil spring being at tached to the bracket 88 which is mounted upon the housing. Upon the upper screw threaded extremity of each stem 36 is provided a wing nut 39 for the purpose of adjusting the tension upon the levers. Attention is called to the fact that the off-set portion 3a of each of the levers upon the upper roll is outwardly disposed in order to bring the coil spring into alinenient with the bracket which is mounted upon the end of the housing, while the oii-set portions of the lower levers are inwardly disposed as the brackets which hold the lower coil springs are mounted upon the base portions of the housing.

The springs 37 hold the plates 9 in such position that the desired number of grinding blocks may be constantly held in engagement with the peripheral surface of the roll. The two outside blocks are kept in contact with the roll as much as possible for the purpose of continuously grinding the peripheral surface of the roll at each extremity thereof, thus reducing the concavity of the roll which is being increased by the sheets being passed through the rolls continuously during the operation of the mill.

It will be understood, of course, that the cams may be placed in any desired position upon the cam shaft in order to operate any.

one block or any desired combination thereof independently of the remaining blocks. As shown in the accompanying drawings, especially in Fig. 3 the two outer blocks are adapted to be operated together and independently of the two inner blocks, said inner blocks being operated in unison.

The mechanism above described constitutes the grinding device which is located upon one side of each roll. For the purpose of polishing the roll, a somewhat similar device is located upon the other side of the roll. said device being provided with. smoothing or polishing blocks which are of a finer teX- ture than the hlccks above referred to. Thisdevice comprises a pair of levers 5 similarly constructed and equipped to the levers 5, a

plate 9 being carried between said levers. said plate being simllar to the plate 9 and provided with a plurality of retainers 13,

which retainers are mounted upon the plate 9 in" the same manner in which the retainers are'mounted uponthe plate;9, each of the retainers being-- provided with a, polishing;

block 15?, said block being preferably of finer texture than the blocks 15. In this device it will be noted that the polishing blocks are continued across the entire face of the roll, whereas in the grinding device the blocks are located at each end of the roll, the central portion of the roll not being engaged by any of the grinding blocks. In the polishing device all of the retainers and polishing blocks are located end to end as shown in Fig. 2 and each of the blocks and retainers is provided with beveled extremities adapted to fit between the extremities of the adjacent blocks and retainers. In this construction the retainers at each end are formed with the closed extremity such as is illustrated in Fig. 3 and the intervening retainers are open at each extremity.

It will thus be seen from the above descrip tion that with the use of this device different combinations of grinding blocks and different combinations of polishing blocks may be held in engagement with each roll during the operation of the mill, thus continuously grinding the portions of the roll toward each extremity thereof and, polishing any desired portions of the roll or the entire surface of the roll. In practice the two grinding blocks located at the extremities of the roll will be kept in contact with the surface of the roll during the greater part of the time in order to reduce the concavity of the roll which is naturally being increased by the passing ofsheets through the mill. At the same time any or all of the finer polishing blocks may be held in contact with the roll in order to keep the surface of the roll in the proper condition. If desired, it will be seen from an inspection of the drawings and the above description the device may be so opera-ted that the blocks held in engagement upon one side of the roll will be located in staggered relation to the blocks held on the other side of the roll, it having been found from experience that especially good results may be obtained by thus locating the blocks in staggered relation.

Pivoted upon each pair of levers 5 and 5 upon the lower roll is a plate tO, said plate resting across the surface of the lower roll as shown in Fig. 1 and being for the purpose of protecting the grinding and polishing mechanism upon the lower roll, preventing any dirt or foreign matter from dropping upon the grinding and polishing mechanlsm.

Owing to the fact that the bearings in rolling mills of the usual construction are generally formed of brass or other soft metal, the continual rotation of the rolls causes the blocks to wear and this wear is uneven, thus allowing the roll to move out of true alinement longitudinally or laterally. This very diflicult to bring the plate, upon which the polishing blocks are mounted, into'the proper position to bring the blocks at each" side of the center into contact with the peripheral surface of the roll, unless some adjustment is provided. To overcome this difficulty I have found it preferable to hingedly attach one of the levers to the plate as best shown in Fig. 7 of the drawings. A pair of lugs 41 are provided upon the rear face of the plate 9 adjacent one extremity thereof and the lower extremity of the lever is located between said lugs and hingedly connected thereto by means of a pin e2, said lever being provided with a flat face 43, which is spaced from the rear face of the plate 9 as shown in Fig. 7. The flat face 43 upon the lever being spaced a slight distance from the rear face of the plate 9 and the plate being hingedly connected to the extremity of the lever by the pins l2 passing through the lugs 41, the plate 9 may move upon the pin 42 a slight distance in either direction, the upper and lower extremities of the fiat portion %3 of the lever forming stops to limit the pivotal movement of the plate in either direction. By thus pivotally connecting one of the levers to the plate 9 sufficient adjustment of the plate is procured to allow the plate to assume the proper position to bring the desired polishing blocks into engagement with the surface of the roll. It is of course understood that the rolls at times wear unevenly and if the plate 9 were rigidly connected to both of the levers it would be impossible at times to bring the plate into the proper alinementwith the roll in which case all of the desired polishing blocks would not be brought into contact with the face of the roll. By this construction a slight movement between the plate and the lever is obtained, thus providing an automatic adjustment, the springs 37 automatically bringing the polishing blocks into alinement with the roll, thus causing the polishing blocks at both extremities of the plate to be held in contact with the peripheral surface of the roll.

Although the drawings and above specification disclose the best mode in which I have contemplated embodying my invention I desire to be not limited to the details of such disclosure, for in the further practical application of my invention, many changes in form and construction may be made, as cir-.

cumstances require or experience suggests, without departing from the spirit of the invention, within the scope of the appended claims.

I claim 1. A device of the character described, adapted to polish the surface of a roll during the operation of the mill, said device comprising in combination with said roll, a plurality of polishing blocks located at each side of the roll, said blocks being located in staggered relation to each other.

2. A device of the character described adapted to polish the surface of a roll dur ing the operation of the mill, said device comprising in combination with said roll, a plurality of polishing blocks mounted upon a frame upon one side of said roll and a plurality of grinding blocks mounted upon a frame at the other side of said roll.

3. A device of the character described adapted to polish the surface of a roll during the operation of the mill, said device comprising in combination with said roll, a plurality of polishing blocks mounted upon a frame upon one side of said roll and a plurality of grinding blocks mounted upon a frame at the other side of said roll, and individual means for moving different combinations of said blocks into contact with the roll.

4. A device of the character described adapted to polish the surface of a roll during the operation of the mill, said device comprising in combination with said roll, a plurality of grinding blocks mounted at one side of said roll and adapted to grind the surface of the roll adjacent each end thereof and a plurality of polishing blocks mounted at the other side of said roll and adapted to polish the entire surface of the roll.

5. A device of the character described adapted to polish the surface of a roll during the operation of the mill, said device comprising in combination with said roll, a frame located at one side of the roll, grinding blocks mounted in said frame adjacent each extremity of the roll, a second frame mounted at the opposite side of the roll, a plurality of polishing blocks mounted in said second frame and extending the entire length of the roll, and means for holding said blocks in contact with said roll.

6. A device of the character described adapted to polish the surface of a roll during the operation of the mill, said device comprising in combination with said roll, a frame mounted at one side of the roll, grinding blocks mounted in said frame adjacent each extremity of the roll, a second frame mounted at the opposite side of the roll, a plurality of polishing blocks carried in said second frame, and means for moving different combinations of said polishing blocks into contact with the roll.

7. A device of the character described adapted to polish the surface of a roll during the operation of the mill, said device comprising in combination with said roll, a frame located adjacent the peripheral face of the roll, a plurality of grinding blocks pivotally mounted in said frame, a cam shaft mounted upon said frame, individual dependently moving said grinding blocks into contact with the peripheral surface of the roll, a second frame located at the other side of the roll, a plurality of polishing blocks mounted in said second named frame, a cam shaft mounted upon said second named frame, individual cams upon said second named cam shaft adapted to engage said grinding blocks for the purpose of independently moving said polishing blocks into contact with the peripheral surface of the roll, and means for rotating said cam shafts.

S. A roll polishing device for a rolling mill, comprising in combination with a roll, a frame located at each side of said roll, a plurality of polishing blocks mounted upon each of said frames and independent means for moving different desired combinations of said polishing blocks into contact with the peripheral face of the roll.

9. A roll polishing device for a rolling mill, comprising in combination with a roll, a frame located at each side of the roll, a plurality of polishing blocks mounted in each of said frames in staggered relation to each other and means for moving the blocks upon opposite sides into contact with the face of the roll.

10. A roll polishing device for a rolling mill comprising in combination with a roll, a plate located adjacent the peripheral face of said roll, a plurality of retainers pivotally mounted upon said plate, each of said retainers provided with a dove-tailed groove, and a dove-tailed polishing block located within the groove in each retainer, the retainer at each extremity being provided with a wall at the outer extremity of the dovetail groove.

11. In a roll polishing device, in combination with a rolling mill, a pair of levers pivoted upon the housing of said mill, a plate carried between the lower extremities of said levers, one of said levers being pivotally connected to said plate, a plurality of polishing blocks mounted upon said plate and means connected to said levers adapted to hold said polishing blocks in engagement with said rolls.

12. A roll polishing device for a rolling mill, comprising in combination with a roll, a frame located adjacent the peripheral face of said roll, a plurality of polishing blocks pivotally mounted on said frame, a cam shaft mounted upon said frame, individual cams mounted upon said cam shaft, a roller carried by each of said cams and adapted to engage said polishing blocks for the purpose of independently moving said polishing blocks into engagement with the peripheral surface of said roll and means for rotating upon opposite sides into contact With the said cam shaft. face of the roll, the extremities of each block 10 13. A roll polishing device for a rolling overlapping the polishing surface covered mill. comprising in combination with a roll, by the extremities of the two adjacent blocks a frame located at each side of the roll, a upon the opposite side of the roll.

plurality of polishing blocks mounted in In testimony that I claim the above, I

each of said frames in staggered relation to have hereunto subscribed my name.

each other and means for moving the blocks ARTHUR J. MASKREY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. a 

